added more tests for grib file comparison and removed detected BUGS

Source/Python/Classes/EcFlexpart.py

...ssion/Compare_gribfiles/7.1/Controls/CONTROL_CERA.compare

...ression/Compare_gribfiles/7.1/Controls/CONTROL_EI.compare

...gribfiles/7.1/Controls/CONTROL_OD.OPER.FC.36hours.compare

...are_gribfiles/7.1/Controls/CONTROL_OD.OPER.FC.eta.compare

.../Regression/Compare_gribfiles/Log/log_2020-01-31_13-17-45

Testing/Regression/Compare_gribfiles/run_cmp_test.sh

Testing/Regression/Compare_gribfiles/test_cmp_grib_file.py

Testing/Regression/Mars_request/test_cmp_mars_requests.py